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KarenzMT®

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product
name
KarenzMT PE1
structure
chemical
name
Pentaerythritol tetrakis
(3-mercaptobutylate)
CAS No.

31775-89-0

M.W.
544.8
Appearancecolorless or yellow liquid
Density
1.19 (30℃)
Refractive
Index
1.523
Viscosity
1200mPa・s(24℃)
Flash Point
with no flamability

There are also other type of thiols, two or three functional types, in KarenzMT series .
>>other types


Characteristics of KarenzMT

● Rapid Curing
● Excellent shelf-life
● Weak odor


Performance


Characteristics for Epoxy Curing Agent Characteristics for UV Curing Additive



取扱いおよび保管上の注意
Please read our MSDS before using KarenzMT

■Handling■
Take measures against static electricity and wear conductive clothes and shoes.
Handle the product where adequate local exhaust ventilation is provided.
Wear protective glasses, gloves and mask. Wash hands with water after handling.

■Storage■
Store the product in a dry, cool, and dark place. Do not allow high temperature objects, sparks or flame in the vicinity of the product.
Use a closed container.

※The information contained herein is based upon data considered true and accurate. However, SHOWA DENKO K.K. accepts no responsibility or risk which may result from the handling and use of products or for infringement of any patent.

 

KarenzMT®

Advantages for Epoxy Curing Agent

・Useful for Cold & Rapid Curing Agent
・Good Hydrolytic Stability
・Good Resistance Against Acid and Base
・Excellent Weather Resistance
・Strong Adhesion
・Excellent Flexibility



 

KarenzMT PE1, tetra-functional primary thiol (PEMP), and Modified amine were compared as epoxy curing agents.



Curing


 

Curing Speed at Low Temperature (5℃)


 

Curing Speed at Low Temperature (5℃)

It was observed that KarenzMT PE1 was cured with epoxy at low
temperature (5℃) and It’s hardness was same as that of cured at 25℃.
Curing Temperature
(℃)
Curing Time
(hour)
Hardness
(Shore D)
Room Temperature2475
5℃
2478

Epoxy ResinBisphenol A based type
C.A.KarenzMT PE1
Primary thiol (PEMP)
Modified amine
AcceleratorTAP (2,4,6-tris (dimethylamino) -phenol)
CompositionEpoxy / Thiol / TAP = 100 / 70 / 10
Epoxy / Modified amine = 100 / 80



Hydrolytic Stability

It was observed that Hydrolytic stability of KarenzMT PE1 resin was good.
KarenzMT PE1 resin was stable after dipping in hot water, while primary thiol resin and Modified amine resin lost transparency.


 

H2O Absorption

Test MethodJIS K7114
Epoxy ResinBisphenol A based type
C.A.KarenzMT PE1
Primary thiol (PEMP)
Modified amine
Accelerator

DMBA(dimethylbenzylamine)

CompositionEpoxy / Thiol / DMBA = 100 / 70 /3.5
Epoxy / Modified amine = 100 / 80
Hydrolytic Stability Test of Epoxy Resins



Resistance Against Acid and Base

KarenzMT PE1 resin showed good resistance against acid and base.


 



Test MethodJIS K7114
Epoxy ResinBisphenol A based type
C.A.KarenzMT PE1
Primary thiol (PEMP)
Modified amine
AcceleratorTAP
CompositionEpoxy / Thiol / TAP = 100 / 70 /10
Epoxy / Modified amine = 100 / 80
Resistance Against Acid and Base Test of Epoxy Resins (23℃ 7days)



Weather Resistance

Sunshine Weather Meter Test
It was observed that KarenzMT PE1 resin didn’t become yellow after weather meter test.

Sunshine Weather Meter Test


 

Epoxy ResinBisphenol A based type
C.A.KarenzMT PE1
Primary thiol (PEMP)
Modified amine
CompositionEpoxy / Thiol / TAP = 100 / 70
Epoxy / Modified amine = 100 / 80
Curing Method
Thermal cure without accelerator
Exposure Condition
Illumination : 255W/m2
Temperature 63℃
Rainfall : 18min./200min.



Adhesion

It was observed that KarenzMT PE1 resin’s adhesion strength was stronger than that of Modified amine resin.


 

Test Method
JIS K6850
Epoxy Resin
Bisphenol A based type
C.A.
KarenzMT PE1
Primary thiol (PEMP)
Modified amine
Accelerator
TAP
Composition
Epoxy / Thiol / TAP = 100 / 70 /10
Epoxy / Modified amine = 100 / 80



Flexibility

Flexure Test
KarenzMT resin showed good flexibility and toughness compared with Modified amine resin.

Flexure Test


 

Test Method
JIS K6481
Epoxy Resin
Bisphenol A based type
C.A.
KarenzMT PE1
Primary thiol (PEMP)
Modified amine
Accelerator
TAP
Composition
Epoxy / Thiol / TAP = 100 / 70 /10
Epoxy / Modified amine = 100 / 80





※The information contained herein is based upon data considered true and accurate. However, SHOWA DENKO K.K. accepts no responsibility or risk which may result from the handling and use of products or for infringement of any patent.